Load Specifications
Load data in caliber 7 x 57 R with .284 | 160gr | Nosler AccuBond bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, ReloadSwiss RS 70 and Alliant Reloder-17.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 43,265 psi | 88% | 2405 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 43,453 psi | 88% | 2448 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,090 psi | 85% | 2497 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 84% | 42,366 psi | 86% | 2418 fps | 98.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 42,627 psi | 86% | 2543 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 44,614 psi | 90% | 2484 fps | 99.7% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,322 psi | 86% | 2451 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 94% | 44,367 psi | 90% | 2559 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 90% | 44,440 psi | 90% | 2585 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,985 psi | 77% | 2461 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,148 psi | 85% | 2605 fps | 97.8% |
| Bofors RP3 | <<locked>> | 86% | 44,570 psi | 90% | 2497 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 84% | 42,728 psi | 87% | 2451 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 43,555 psi | 88% | 2497 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 43,033 psi | 87% | 2493 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,433 psi | 72% | 1578 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 44,498 psi | 90% | 2451 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 82% | 44,527 psi | 90% | 2421 fps | 95.8% |
| IMR 4831 | <<locked>> | 94% | 43,018 psi | 87% | 2497 fps | 98.3% |
| IMR 4895 | <<locked>> | 82% | 43,352 psi | 88% | 2477 fps | 99.2% |
| Lovex S062 | <<locked>> | 84% | 44,425 psi | 90% | 2451 fps | 99.8% |
| Lovex S065 | <<locked>> | 90% | 43,627 psi | 88% | 2444 fps | 97% |
| Lovex S070 | <<locked>> | 92% | 44,135 psi | 90% | 2474 fps | 96% |
| Norma 203B | <<locked>> | 82% | 41,640 psi | 84% | 2441 fps | 98.9% |
| Norma URP | <<locked>> | 92% | 41,974 psi | 85% | 2490 fps | 98% |
| Ramshot Big Game | <<locked>> | 84% | 44,135 psi | 90% | 2507 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 94% | 43,685 psi | 89% | 2530 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,882 psi | 73% | 1614 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,047 psi | 87% | 2434 fps | 96.1% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 44,251 psi | 90% | 2585 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 44,585 psi | 90% | 2566 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,887 psi | 85% | 2530 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 82% | 43,859 psi | 89% | 2421 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 86% | 42,003 psi | 85% | 2444 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 43,627 psi | 88% | 2444 fps | 97% |
| Shooters World Precision | <<locked>> | 84% | 44,425 psi | 90% | 2451 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 92% | 44,135 psi | 90% | 2474 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 43,091 psi | 87% | 2493 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 44,570 psi | 90% | 2375 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 42,598 psi | 86% | 2444 fps | 99.3% |
| Somchem S365 | <<locked>> | 96% | 42,743 psi | 87% | 2546 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 43,004 psi | 87% | 2395 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 43,772 psi | 89% | 2408 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 43,511 psi | 88% | 2431 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 92% | 44,077 psi | 89% | 2493 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 82% | 42,308 psi | 86% | 2405 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 43,207 psi | 88% | 2493 fps | 98% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,307 psi | 84% | 2533 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 43,918 psi | 89% | 2474 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,866 psi | 69% | 2454 fps | 98.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 40,567 psi | 82% | 2362 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,363 psi | 78% | 2359 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,053 psi | 65% | 2290 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 37,492 psi | 76% | 2323 fps | 97.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,856 psi | 81% | 2487 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,072 psi | 75% | 2346 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,798 psi | 81% | 2402 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,532 psi | 66% | 2300 fps | 95.1% |
| Alliant Reloder-17 | 39.1 gr | 80% | 31,879 psi | 65% | 2313 fps | 96.8% |
| Alliant Reloder-23 | <<locked>> | 92% | 29,921 psi | 61% | 2264 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,695 psi | 74% | 2487 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 36,593 psi | 74% | 2349 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 80% | 37,478 psi | 76% | 2349 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,108 psi | 57% | 2162 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,422 psi | 82% | 2448 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,498 psi | 54% | 1411 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,305 psi | 80% | 2352 fps | 98.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,930 psi | 85% | 2375 fps | 95.1% |
| IMR 4831 | <<locked>> | 86% | 33,156 psi | 67% | 2300 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 40,756 psi | 83% | 2431 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 39,305 psi | 80% | 2359 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 38,711 psi | 79% | 2352 fps | 95.7% |
| Lovex S070 | <<locked>> | 90% | 41,539 psi | 84% | 2425 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 39,160 psi | 79% | 2392 fps | 98.5% |
| Norma URP | <<locked>> | 86% | 34,766 psi | 71% | 2346 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 38,493 psi | 78% | 2402 fps | 98.2% |
| Ramshot Hunter | <<locked>> | 90% | 38,479 psi | 78% | 2428 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,716 psi | 54% | 1444 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,567 psi | 82% | 2388 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,939 psi | 69% | 2375 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,026 psi | 69% | 2356 fps | 95.3% |
| ReloadSwiss RS 70 | 43.7 gr | 88% | 36,666 psi | 74% | 2415 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 41,220 psi | 84% | 2375 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 34,490 psi | 70% | 2297 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,711 psi | 79% | 2352 fps | 95.7% |
| Shooters World Precision | <<locked>> | 80% | 39,305 psi | 80% | 2359 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 41,539 psi | 84% | 2425 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,331 psi | 72% | 2343 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,115 psi | 75% | 2254 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,389 psi | 72% | 2303 fps | 98% |
| Somchem S365 | 37.1 gr | 80% | 25,657 psi | 52% | 2146 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 40,611 psi | 82% | 2359 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,118 psi | 83% | 2365 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,605 psi | 68% | 2244 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 34,055 psi | 69% | 2297 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 39,552 psi | 80% | 2356 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,373 psi | 68% | 2297 fps | 95% |
| Vihtavuori N555 | <<locked>> | 92% | 31,807 psi | 65% | 2329 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,733 psi | 60% | 2172 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,892 psi | 61% | 2336 fps | 96.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 50 powders for 7 x 57 R loaded with the .284 | 160gr | Nosler AccuBond. Alliant Reloder-26 delivers the highest muzzle velocity at 2,605 fps; across all powders the maximum-charge window runs from 1,578 fps to 2,605 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 50 of the 50 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, Hodgdon TrailBoss reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Somchem S365, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 7 x 57 R with the .284 | 160gr | Nosler AccuBond they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.